Nagi tries to find a way to establish his identity as a ninja, while Izayoi revives Kibaoni's First Spear.
It's a Nagi focused episode where Takaharu gets all the enemies' attention while Kasumi saves the day.
A nice episode fleshing out some characters. We finally get some Takeuchi action, but it's a bit too short.
PS. Until proven otherwise (which in fairness, is highly likely), I'm going to go with the theory that Izayoi is somehow linked to Takaharu and Fuuka's mother.